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JWST and ALMA reveal a dusty, rapidly growing black hole in the early universe

A new study reveals a dust-reddened quasar from a time when the universe was less than a billion years old. Located at a redshift of 6.5488, the object J1440+0019 contains a rapidly accreting supermassive black hole with a mass of about 1.1 billion suns. The paper was posted to the arXiv preprint server on Oct. 9.

Cosmic reionization is estimated to have happened roughly between 600 million and a billion years (redshifts 6 to 8) after the Big Bang. This epoch is when ionizing UV radiation from early stars and galaxies converted the universe’s neutral hydrogen gas into the ionized state seen today. Studying quasars and galaxies from this era can put a limit on the redshift at which it occurred.

Most quasars from this period are identified by their bright rest-frame ultraviolet light. This method may fail for quasars with even modest dust reddening—their UV emission may be heavily blocked by the surrounding dust envelope. Previous studies suggest that a large fraction of early active galactic nuclei (AGN) are obscured. Only a handful of reddened quasars are known at redshifts around and beyond 6, and they were found by different methods.

Rejuvenation breakthrough: Scientists reverse 60 years of aging in human cells

“We also know that this epigenetic rejuvenation ensures that the cells actually behave like young cells,” says the scientist.

A Slower Rejuvenation Process Reveals New Clues

Scientists have previously observed that reprogramming cells can reset their biological age. However, earlier demonstrations of this effect involved a more complicated process requiring two distinct stages.

Dual targeting of transferrin receptor and CD98hc enhances brain exposure of large molecules

Very intriguing paper on antibodies equipped with binding domains for both the TfR1 and CD98hc receptors (found abundantly on the blood-brain-barrier). Brain uptake was enhanced by using binding domains for both receptors. Wells et al. also varied the TfR1/CD98hc affinities of the binding domains and explored how different combinations of affinities influenced brain uptake and localization within the brain. Interestingly, higher CD98hc affinity made the antibody brain concentration peak at 7 days post-injection whereas higher TfR1 affinity made the antibody brain concentration peak at 1 day post-injection. Additionally, stronger CD98hc binding led to more astrocyte localization while stronger TfR1 binding led to more neuronal localization.

Wells et al. developed a dual-targeting transport vehicle binding both transferrin receptor and CD98hc, two proteins highly expressed at the blood-brain barrier. Through affinity tuning, the authors demonstrated that brain concentration, kinetics, and cellular distribution can be modulated, offering a versatile platform for CNS delivery of biotherapeutics.

This startup’s self-driving excavators help dig up $600M in new funding

Bedrock Robotics has raised $600 million in a funding round that values the autonomous vehicle technology startup at $4.1 billion, marking a speedy ascent for the two-year-old company.

The Series C round, co-led by CapitalG and Emergence Capital, comes two months after the startup reached a key milestone: moving its autonomous excavators beyond testing and pilot programs and putting them to work on active construction sites.

Bedrock Robotics has developed a self-driving kit that can be retrofitted onto construction and other worksite vehicles. Excavators outfitted with Bedrock’s autonomous-driving tech are now commercially operating at a Nevada-based water treatment facility, an earthwork site run by Champion Site Prep in Texas, and a 1.2 million-cubic-yard civil sitework project with Zachry Construction Corporation.

This Machine Can Hijack Your Brain’s ‘Reality Engine’—And Reveal a Hidden World Inside You

Afterward, participants were led into the reflection room where staffers offered to help them process what they had experienced. At a center table, participants could draw what they’d seen. “People had very profound emotional experiences,” Crook says. “We saw a lot of grief, a lot of buried sadness or loneliness. For the first time, people were given a space in which to sit with themselves for an hour or so with their feelings and with other people around them.”

One of those people was Daniel Tudor, a young man who attended the experience 27 times in London. The Dreamachine, he says, allowed him to process unresolved trauma, including the death of his father. After the experience, he called his mother to tell her about it, and “started to cry very hard,” he told the Dreamachine team. “I have never cried in front of my mum before. It was like the experience in the Dreamachine released those emotions which I had buried since childhood.” Since then, Tudor says, he has become calmer, happier, lighter, more accepting of life as it is, more humble and tolerant, more accepting of others’ views.

So how did the Dreamachine experience facilitate that? It comes down to the way our brains experience our environment, says Reeder.